Hello
I face with same error when install AMP plugin and fill declared form for mellatyadak.com.
my site language is set to persian too.
I don’t know why … but today Yoast meta date section completely load.
I occurred same problem after update woo-commerce and Yoast plugin.
.
in public post Yoast portion load as well to catch meta information but when post a new product in woo-commerce meta data section and field do not load as well and disappeared meta data section.
I will check all setting relevant to this section but problem not solved. :((
